Revert of factories should return baseclass, allowing the impl to specialize

include/effects/SkDropShadowImageFilter.h

Index: include/effects/SkDropShadowImageFilter.h
diff --git a/include/effects/SkDropShadowImageFilter.h b/include/effects/SkDropShadowImageFilter.h
index bf4425e925f30f2784798cc38454d5740d731b06..964a5763d37e54d70c8b65fd0350378b72c9a90b 100644
--- a/include/effects/SkDropShadowImageFilter.h
+++ b/include/effects/SkDropShadowImageFilter.h
@@ -20,9 +20,11 @@
 
     static const int kShadowModeCount = kLast_ShadowMode+1;
 
-    static SkImageFilter* Create(SkScalar dx, SkScalar dy, SkScalar sigmaX, SkScalar sigmaY,
-                                 SkColor color, ShadowMode shadowMode, SkImageFilter* input = NULL,
-                                 const CropRect* cropRect = NULL) {
+    static SkDropShadowImageFilter* Create(SkScalar dx, SkScalar dy,
+                                           SkScalar sigmaX, SkScalar sigmaY, SkColor color,
+                                           ShadowMode shadowMode,
+                                           SkImageFilter* input = NULL,
+                                           const CropRect* cropRect = NULL) {
         return new SkDropShadowImageFilter(dx, dy, sigmaX, sigmaY, color, shadowMode, input,
                                            cropRect);
     }
@@ -32,18 +34,16 @@
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkDropShadowImageFilter)
 
 protected:
+    SkDropShadowImageFilter(SkScalar dx, SkScalar dy, SkScalar sigmaX, SkScalar sigmaY, SkColor,
+                            ShadowMode shadowMode, SkImageFilter* input, const CropRect* cropRect);
     void flatten(SkWriteBuffer&) const override;
-    bool onFilterImage(Proxy*, const SkBitmap& source, const Context&, SkBitmap* result,
-                       SkIPoint* loc) const override;
-    bool onFilterBounds(const SkIRect& src, const SkMatrix&, SkIRect* dst) const override;
+    bool onFilterImage(Proxy*, const SkBitmap& source, const Context&, SkBitmap* result, SkIPoint* loc) const override;
+    virtual bool onFilterBounds(const SkIRect& src, const SkMatrix&,
+                                SkIRect* dst) const override;
 
 private:
-    SkDropShadowImageFilter(SkScalar dx, SkScalar dy, SkScalar sigmaX, SkScalar sigmaY, SkColor,
-                            ShadowMode shadowMode, SkImageFilter* input, const CropRect* cropRect);
-
     SkScalar fDx, fDy, fSigmaX, fSigmaY;
     SkColor fColor;
     ShadowMode fShadowMode;
-
     typedef SkImageFilter INHERITED;
 };